2nd/10_Wiki/Dev/Topic_PHP/PHP_Form_Complete.md

id, title, category, status, verification_status, canonical_id, aliases, duplicate_of, source_trust_level, confidence_score, created_at, updated_at, review_reason, merge_history, tags, raw_sources, applied_in, github_commit

id	title	category	status	verification_status	canonical_id	aliases	duplicate_of	source_trust_level	confidence_score	created_at	updated_at	review_reason	merge_history	tags	raw_sources	applied_in	github_commit
php-form-complete	PHP Form Complete	Programming_Language	draft	conceptual		sticky forms PHP 폼 완성 예제		B	0.87	2026-07-04	2026-07-04			php programming w3schools forms validation	https://www.w3schools.com/php/php_form_complete.asp

PHP Form Complete

🎯 한 줄 통찰 (One-line insight)

Radio buttons are "re-checked" differently from text fields after submission — text inputs echo into the value attribute (value="<?php echo $name;?>"), but radio buttons instead conditionally echo the literal word "checked" into the tag based on which value matches, since a radio's persisted state is a boolean attribute, not a value string. [S1]

🧠 핵심 개념 (Core concepts)

• Sticky form pattern — preserving submitted values in the form after validation errors, so the user doesn't have to re-type everything. [S1]
• Text inputs — echo the variable into the value attribute. [S1]
• Textarea — echo the variable BETWEEN the opening/closing tags (no value attribute exists for textarea). [S1]
• Radio buttons — conditionally echo the literal string "checked" based on an isset() + equality check against the submitted gender. [S1]

📖 세부 내용 (Details)

• Text input sticky value: <input type="text" name="name" value="<?php echo $name;?>">. [S1]
• Textarea sticky value: <textarea name="comment" rows="5" cols="40"><?php echo $comment;?></textarea>. [S1]
• Radio button sticky check: <input type="radio" name="gender" <?php if (isset($gender) && $gender=="female") echo "checked";?> value="female">Female. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

소스에서 모순되는 정보는 발견되지 않음.

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — 검증 실패 후에도 입력값을 유지하는 sticky form 패턴이 사용자 경험 개선의 실전 사례다. [S1]

💻 코드 패턴 (Code patterns)

Preserving a radio button's checked state after submission (PHP):

<input type="radio" name="gender"
    <?php if (isset($gender) && $gender=="female") echo "checked";?>
    value="female">Female

✅ 검증 상태 및 신뢰도

• 상태: draft
• 검증 단계: conceptual
• 출처 신뢰도: B (W3Schools — widely used educational reference, not a primary standards body)
• 신뢰 점수: 0.87
• 중복 검사 결과: 신규 생성 (New discovery)

🔗 지식 그래프 (Knowledge Graph)

• 상위/루트: PHP Tutorial
• 관련 개념: PHP Form URL Email, PHP Date
• 참조 맥락: 폼 검증 섹션의 마무리 — 날짜(Date) 섹션으로 이어짐.

📚 출처 (Sources)

• [S1] W3Schools — PHP Complete Form Example — https://www.w3schools.com/php/php_form_complete.asp

📝 변경 이력 (Change history)

• 2026-07-04: Initial draft synthesized from the W3Schools "PHP Complete Form Example" page (Astra wiki-curation, P-Reinforce v3.1 format).